2125500031 has 4 divisors (see below), whose sum is σ = 2125959552. Its totient is φ = 2125040512.

The previous prime is 2125500023. The next prime is 2125500059. The reversal of 2125500031 is 1300055212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2125500031 - 2³ = 2125500023 is a prime.

It is a super-2 number, since 2×2125500031² = 9035500763562001922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2125499981 and 2125500008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125500011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222751 + ... + 232096.

It is an arithmetic number, because the mean of its divisors is an integer number (531489888).

Almost surely, 2^2125500031 is an apocalyptic number.

2125500031 is a deficient number, since it is larger than the sum of its proper divisors (459521).

2125500031 is an equidigital number, since it uses as much as digits as its factorization.

2125500031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459520.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 2125500031 is about 46103.1455651347. The cubic root of 2125500031 is about 1285.7416282445.

Adding to 2125500031 its reverse (1300055212), we get a palindrome (3425555243).

The spelling of 2125500031 in words is "two billion, one hundred twenty-five million, five hundred thousand, thirty-one".